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| 1 | +//! GPU information collection from sysfs/drm |
| 2 | + |
| 3 | +use crate::error::Result; |
| 4 | +use gartop_ipc::{GpuDevice, GpuStats}; |
| 5 | +use std::fs; |
| 6 | +use std::path::Path; |
| 7 | +use std::time::{SystemTime, UNIX_EPOCH}; |
| 8 | + |
| 9 | +/// GPU information collector. |
| 10 | +pub struct GpuCollector; |
| 11 | + |
| 12 | +impl GpuCollector { |
| 13 | + /// Create a new GPU collector. |
| 14 | + pub fn new() -> Result<Self> { |
| 15 | + Ok(Self) |
| 16 | + } |
| 17 | + |
| 18 | + /// Collect current GPU stats from all devices. |
| 19 | + pub fn collect(&mut self) -> Result<GpuStats> { |
| 20 | + let mut devices = Vec::new(); |
| 21 | + |
| 22 | + // Check for DRM devices (AMD, Intel) |
| 23 | + let drm_path = Path::new("/sys/class/drm"); |
| 24 | + if drm_path.exists() { |
| 25 | + if let Ok(entries) = fs::read_dir(drm_path) { |
| 26 | + for entry in entries.flatten() { |
| 27 | + let name = entry.file_name(); |
| 28 | + let name_str = name.to_string_lossy(); |
| 29 | + |
| 30 | + // Only process card* entries, not renderD* |
| 31 | + if name_str.starts_with("card") && !name_str.contains('-') { |
| 32 | + if let Some(device) = Self::read_drm_device(&entry.path(), &name_str) { |
| 33 | + devices.push(device); |
| 34 | + } |
| 35 | + } |
| 36 | + } |
| 37 | + } |
| 38 | + } |
| 39 | + |
| 40 | + let timestamp = SystemTime::now() |
| 41 | + .duration_since(UNIX_EPOCH) |
| 42 | + .map(|d| d.as_millis() as u64) |
| 43 | + .unwrap_or(0); |
| 44 | + |
| 45 | + Ok(GpuStats { devices, timestamp }) |
| 46 | + } |
| 47 | + |
| 48 | + /// Read GPU info from a DRM device directory. |
| 49 | + fn read_drm_device(card_path: &Path, card_name: &str) -> Option<GpuDevice> { |
| 50 | + let device_path = card_path.join("device"); |
| 51 | + if !device_path.exists() { |
| 52 | + return None; |
| 53 | + } |
| 54 | + |
| 55 | + // Read GPU model from various sources |
| 56 | + let model = Self::read_gpu_model(&device_path); |
| 57 | + |
| 58 | + // GPU utilization (AMD: gpu_busy_percent) |
| 59 | + let usage_percent = Self::read_file_f64(device_path.join("gpu_busy_percent")) |
| 60 | + .unwrap_or(0.0); |
| 61 | + |
| 62 | + // VRAM stats (AMD) |
| 63 | + let vram_used = Self::read_file_u64(device_path.join("mem_info_vram_used")) |
| 64 | + .unwrap_or(0); |
| 65 | + let vram_total = Self::read_file_u64(device_path.join("mem_info_vram_total")) |
| 66 | + .unwrap_or(0); |
| 67 | + |
| 68 | + // GPU clock from hwmon (varies by vendor) |
| 69 | + let clock_mhz = Self::find_gpu_clock(&device_path); |
| 70 | + |
| 71 | + // GPU temperature from hwmon |
| 72 | + let temp_celsius = Self::find_gpu_temp(&device_path); |
| 73 | + |
| 74 | + // Power usage from hwmon (in microwatts, convert to watts) |
| 75 | + let power_watts = Self::find_gpu_power(&device_path); |
| 76 | + |
| 77 | + // Skip if we couldn't get any meaningful data |
| 78 | + if usage_percent == 0.0 && vram_total == 0 && clock_mhz.is_none() && temp_celsius.is_none() { |
| 79 | + return None; |
| 80 | + } |
| 81 | + |
| 82 | + Some(GpuDevice { |
| 83 | + name: card_name.to_string(), |
| 84 | + model, |
| 85 | + usage_percent, |
| 86 | + vram_used, |
| 87 | + vram_total, |
| 88 | + clock_mhz, |
| 89 | + temp_celsius, |
| 90 | + power_watts, |
| 91 | + }) |
| 92 | + } |
| 93 | + |
| 94 | + /// Read GPU model name from device info. |
| 95 | + fn read_gpu_model(device_path: &Path) -> String { |
| 96 | + // Try uevent for DRIVER info |
| 97 | + if let Some(uevent) = Self::read_file(device_path.join("uevent")) { |
| 98 | + for line in uevent.lines() { |
| 99 | + if let Some(driver) = line.strip_prefix("DRIVER=") { |
| 100 | + return driver.to_string(); |
| 101 | + } |
| 102 | + } |
| 103 | + } |
| 104 | + |
| 105 | + // Try product name from DRM |
| 106 | + if let Some(name) = Self::read_file(device_path.join("product_name")) { |
| 107 | + return name.trim().to_string(); |
| 108 | + } |
| 109 | + |
| 110 | + // Try vendor/device for PCI |
| 111 | + let vendor = Self::read_file(device_path.join("vendor")) |
| 112 | + .map(|s| s.trim().to_string()) |
| 113 | + .unwrap_or_default(); |
| 114 | + let device = Self::read_file(device_path.join("device")) |
| 115 | + .map(|s| s.trim().to_string()) |
| 116 | + .unwrap_or_default(); |
| 117 | + |
| 118 | + if !vendor.is_empty() && !device.is_empty() { |
| 119 | + return format!("{} {}", vendor, device); |
| 120 | + } |
| 121 | + |
| 122 | + "Unknown GPU".to_string() |
| 123 | + } |
| 124 | + |
| 125 | + /// Find GPU clock frequency from hwmon. |
| 126 | + fn find_gpu_clock(device_path: &Path) -> Option<u32> { |
| 127 | + let hwmon_path = device_path.join("hwmon"); |
| 128 | + if !hwmon_path.exists() { |
| 129 | + return None; |
| 130 | + } |
| 131 | + |
| 132 | + if let Ok(entries) = fs::read_dir(&hwmon_path) { |
| 133 | + for entry in entries.flatten() { |
| 134 | + let hwmon_dir = entry.path(); |
| 135 | + |
| 136 | + // Try freq1_input (GPU clock in Hz) |
| 137 | + if let Some(hz) = Self::read_file_u64(hwmon_dir.join("freq1_input")) { |
| 138 | + return Some((hz / 1_000_000) as u32); // Hz to MHz |
| 139 | + } |
| 140 | + |
| 141 | + // Try pp_dpm_sclk for AMD (current clock with * marker) |
| 142 | + if let Some(sclk) = Self::read_file(device_path.join("pp_dpm_sclk")) { |
| 143 | + for line in sclk.lines() { |
| 144 | + if line.contains('*') { |
| 145 | + // Format: "0: 500Mhz *" or similar |
| 146 | + if let Some(mhz_str) = line.split_whitespace().nth(1) { |
| 147 | + if let Some(mhz) = mhz_str.strip_suffix("Mhz") |
| 148 | + .or_else(|| mhz_str.strip_suffix("MHz")) |
| 149 | + { |
| 150 | + if let Ok(val) = mhz.parse::<u32>() { |
| 151 | + return Some(val); |
| 152 | + } |
| 153 | + } |
| 154 | + } |
| 155 | + } |
| 156 | + } |
| 157 | + } |
| 158 | + } |
| 159 | + } |
| 160 | + |
| 161 | + None |
| 162 | + } |
| 163 | + |
| 164 | + /// Find GPU temperature from hwmon. |
| 165 | + fn find_gpu_temp(device_path: &Path) -> Option<f64> { |
| 166 | + let hwmon_path = device_path.join("hwmon"); |
| 167 | + if !hwmon_path.exists() { |
| 168 | + return None; |
| 169 | + } |
| 170 | + |
| 171 | + if let Ok(entries) = fs::read_dir(&hwmon_path) { |
| 172 | + for entry in entries.flatten() { |
| 173 | + let hwmon_dir = entry.path(); |
| 174 | + |
| 175 | + // Look for temp1_input (GPU edge temp) |
| 176 | + if let Some(millidegrees) = Self::read_file_i64(hwmon_dir.join("temp1_input")) { |
| 177 | + return Some(millidegrees as f64 / 1000.0); |
| 178 | + } |
| 179 | + } |
| 180 | + } |
| 181 | + |
| 182 | + None |
| 183 | + } |
| 184 | + |
| 185 | + /// Find GPU power usage from hwmon. |
| 186 | + fn find_gpu_power(device_path: &Path) -> Option<f64> { |
| 187 | + let hwmon_path = device_path.join("hwmon"); |
| 188 | + if !hwmon_path.exists() { |
| 189 | + return None; |
| 190 | + } |
| 191 | + |
| 192 | + if let Ok(entries) = fs::read_dir(&hwmon_path) { |
| 193 | + for entry in entries.flatten() { |
| 194 | + let hwmon_dir = entry.path(); |
| 195 | + |
| 196 | + // power1_average (microwatts) |
| 197 | + if let Some(microwatts) = Self::read_file_u64(hwmon_dir.join("power1_average")) { |
| 198 | + return Some(microwatts as f64 / 1_000_000.0); |
| 199 | + } |
| 200 | + } |
| 201 | + } |
| 202 | + |
| 203 | + None |
| 204 | + } |
| 205 | + |
| 206 | + /// Read a file to string. |
| 207 | + fn read_file<P: AsRef<Path>>(path: P) -> Option<String> { |
| 208 | + fs::read_to_string(path).ok() |
| 209 | + } |
| 210 | + |
| 211 | + /// Read a file as u64. |
| 212 | + fn read_file_u64<P: AsRef<Path>>(path: P) -> Option<u64> { |
| 213 | + Self::read_file(path)?.trim().parse().ok() |
| 214 | + } |
| 215 | + |
| 216 | + /// Read a file as i64. |
| 217 | + fn read_file_i64<P: AsRef<Path>>(path: P) -> Option<i64> { |
| 218 | + Self::read_file(path)?.trim().parse().ok() |
| 219 | + } |
| 220 | + |
| 221 | + /// Read a file as f64. |
| 222 | + fn read_file_f64<P: AsRef<Path>>(path: P) -> Option<f64> { |
| 223 | + Self::read_file(path)?.trim().parse().ok() |
| 224 | + } |
| 225 | +} |
| 226 | + |
| 227 | +impl Default for GpuCollector { |
| 228 | + fn default() -> Self { |
| 229 | + Self |
| 230 | + } |
| 231 | +} |
